A seasonal activity in the reproduction of Thelazia callipaeda, coinciding with the presence/absence of the vector could be observed. The activity of Phortica variegata ranged from early spring to early autumn (Otranto et al., 2004).
- Otranto D, Lia RP, Buono V, et al.: Biology of Thelazia callipaeda (Spirurida, Thelaziidae) eyeworms in naturally infected definitive hosts. Parasitol. 2004, 129, 627-33